426760320721 has 4 divisors (see below), whose sum is σ = 487726080832. Its totient is φ = 365794560612.

The previous prime is 426760320659. The next prime is 426760320733. The reversal of 426760320721 is 127023067624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 426760320721 - 2²¹ = 426758223569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426760320821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30482880045 + ... + 30482880058.

It is an arithmetic number, because the mean of its divisors is an integer number (121931520208).

Almost surely, 2^426760320721 is an apocalyptic number.

It is an amenable number.

426760320721 is a deficient number, since it is larger than the sum of its proper divisors (60965760111).

426760320721 is an equidigital number, since it uses as much as digits as its factorization.

426760320721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60965760110.

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 426760320721 in words is "four hundred twenty-six billion, seven hundred sixty million, three hundred twenty thousand, seven hundred twenty-one".